Section B, NAME 357 - dssdd PDF

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Term Final Question, Term II, 2017

1. (a) What is a cutter suction dredger? What are the advantages and disadvantages of CSDs? (10+10+15) (b) How does the cutter head work? Which cutter heads are suitable for which type of soil? (c) Write down the principal specifications and the salient features of a standard IHC Beaver 50 CSD? 5. (a) What is inert gas system? Why it is used in oil tankers? (05+15+15) (b) Explain the salient features of the following in a containership; cargo crane, cargo hold, lashing system, bridge. (b) Estimate the principal dimensions of a containership of service draft 9.0 and service speed of 23 knots with 1400 containers of 6.05X2.43x2.43 m to be placed as 1000 nos. in holds and 400 nos. on deck. The containers are 7 high in each cell with 9 cells across the ship. (c) (a) What is a ro-ro ship? Explain in brief different variations of ro-ro ships. (10+10+15) (a) Explain in brief loading methods of ro-ro ships by using different alternative systems and components. (b) Explain in brief different characteristics of multi-hull vessels. (b) (a) Explain in brief the brown water, green water and blue water region in maritime geography. (08+07+20) (b) Classify different warships based on their sizes. (c) A guided missile destroyer of 6000 tonf, speed 30 knots and shp 60,000 at full power has an endurance of 5000 miles at 18 knots. The group weights are; hull 2300 tonf, machinery 1500 tonf, armament 600 tonf, fuel 1200 tonf and equipment 400 tonf. Estimate the displacement and group weights of a similar ship with an additional 50 tonf of armament and a full power speed of 28 knots. The

endurance is to be 5500 miles at 20 knots. Make any suitable assumptions necessary....